F4 frequency
In standard tuning (A4 = 440 Hz), F4 is 349.23 Hz. It's MIDI note 65 and key 45 of 88 on a piano.
| Frequency | 349.23 Hz |
| Period | 2.863 ms |
| Wavelength in air | 0.98 m |
| One octave down | F3 · 174.61 Hz |
| One octave up | F5 · 698.46 Hz |
| At A4 = 432 Hz | 342.88 Hz |
F4 is within the usual range of piano, guitar, bass guitar, violin, viola, cello, flute, trumpet, ukulele, a tenor voice, an alto voice and a soprano voice.
See every note on the note frequency chart, or train your ear to recognise notes like this one in the course.
Questions
What is the frequency of F4?
349.23 Hz in standard tuning, where A4 is 440 Hz.
What is F4 at 432 Hz tuning?
If A4 is tuned to 432 Hz, F4 becomes 342.88 Hz.
Which octave is F4 in?
Octave 4. Octaves are numbered from C, so F4 sits above middle C (C4).
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